Steam-boiler



(No Model.) 2 SheetsSheet 1k E. B. BIRGE.

STEAM BOILER.

No. 856,914. Patented Feb. 1, 1887.

WITNESS INVENTOR:

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2 Sheets-Sheet 2. E, B. BIRGE.

(No Model.)

STEAM BOILER.

No. 856,914. Patented Feb. 1, 1887.

WITNESSES: 61/

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UNITED STATES Parent @rricu.

ELIAS B. BIRGE, OF ST. PAUL, MINNESOTA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 356,914, dated February 1, 1887.

Application filed October 18, 1886. Serial No. 216,568. (No model.)

To all whom it may concern.-

Be it known that I, ELIAS B. BIRGE, of St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and Lu proved StcanrBoiler, of which the following is a full, clear, and exact description.

My invention relates to upright steanrboil ers designed more especially for fireengines; and the invention consists in the construction, arrangement, and combination of parts, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the views.

Figure 1 is a sectional elevation of a boiler constructed in accordance with my invention. Figs. 2 and 3 are sectional plan views taken, respectively, on the lines x w and 3 y of Fig. l; and Fig. 4 is a sectional plan view on line a z, Fig. 1, the gratebars being omitted.

The lire-box A, gratebars B, and boilercasing C, with smoke-stack C, may be of the usual or of any approved construction, and the tubes D may be set in the tube-plates EF of the boiler in the usual manner.

The fire-box A is made of less diameter than the boiler C to form the waterleg A, and within the firebox A is or are placed the pipes G, (one or more) arranged to take water from the water-leg A", and to discharge it above the lower tubeplate, E. In this in stance the tubes G are bent, as shown in Figs. 1 and at, to increase the heatingsurface, and are all upwardly inclined and connected at their upper ends to the central large tube or chamber, H, fitted in thelower tube-plate, E, and formed with several discharge-openings, a, above the tube-plate, so that when heated there will be a constant flow or circulation of water from the bottom of the water-leg A, through the pipes G and pipe H, to the main upper watcrspace of the boiler.

Above the upper tube-plate, F, is placed the coiled pipe J, one end, j, of which terminates in a rose within the main water-space, as shown in Fig. 1, while the other end, j, passes down through the two tube-plates to the firebox A, and to this lower end of the pipe J is water-leg A of the boiler, so that when the pump is operated by the lever O, or other Wise, the water in the boiler will be drawn from the lower part of the boiler, passedthrough the pump and pipe L in the firebox, then through the pipe J, and heated therein above the tubes D, and returned in spray or small streams to the upper part of the boiler through the rosej. The pump M need be operated only at the time of starting the fires to circulate the cold water in the boiler to cause rapid heating, for as soon as the water is considerably heated a circulation will begin and continue through the pipes G H, so that the water will constantly pass from the leg A through the pipes G and chamber H inthe tirebox, and out the discharge-openings a to the boiler again. The fced-waterentering at pipe K will pass through the pipe J, and become heated therein by the heat and products of combustion rising through the tubes D before entering the boiler, and to prevent the feedwater from entering the pump M, I fit on the pipe L, near the pump, the cock P,which may be opened when the pump is to be operated by awrench or lever, P.

By arranging the boiler accessories as described 21. very rapid generation of steam is effected, and the heat from the burning fuel is utilized to the best advantage.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. The pipe J, coiled above the boiler'tubes, and terminating at one end in the waterspace and at the other in the fire-box, in combination with the feedpipe K, connected to the pipe J in the fire-box, substantially as described.

2. The pump M, connected by pipeN to the water-leg A of the boiler, and connected by pipe L in the fire-box to the pipe J, located in the smoke-box above the fire-tubes, and directly exposed to the products of combustion, and terminating in the water-space, substantially as described.

3. The lower tube-plate, E, having the pipe H, fitted init, formed with the discharge-openings a and projecting in the fire-box, in combination with the pipe G, connected with the water-leg A and with the pipe H, substantially as and for the purposes set forth.

Witnesses: ELIAS B. BIRGE.

HENRY GALVIN, W. P. MURRAY. 

